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looks like the skirt for the drake tr3 vfo knob.

OK - just checked my TR-4, and it does have an arrow! This one is not the flat dial, but the beveled one like the B-line. Gary's right though - no numbers on it. It's conceivable then to me that the

The rx/tx have numbers, the transceivers didn’t. 73, Gary WB6OGD

I almost like the idea of there being one mark per revolution on the dial. It sort of helps to count the digits. Thanks, Barry - N4BUQ

I have a couple like that here too, if anyone needs one. Not sure about it being for a TR-3 or early TR-4. They had a plate like that under the fluted knob, yes, but not sure it ever had an *arrow *on

That’s TR-3/early TR-4 that uses the fluted knob. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS

How are the caps in the tuned circuit? Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS

Yep — a cheap Chinese generator that I bought on Amazon. It is more than stable and accurate enough to align these radios. I feed through an in-line capacitor per the procedure. My generator goes

Not sure if any of you guys have seen this. According to the poster, it's 2.25" in diameter so smaller than a 2-B dial at 2.5" but maybe someone recognizes it here and could use it.

Thanks, Peter. I’m not sure that I had all of this early one. I’ll be getting back to the 1-A after I finish the 2-AB’s, then a TR7 mystery and a driver issue with the TR-4Cw RIT. I’m busier

I can check later. I am pretty sure that the one that came with it was original (and it turned out to not be bad). It’s pretty small, as audio output xformers go. Steve Wedge, W1ES/4 Time flies like

There are a lot of function generators on ebay for under $ 100 that start at almost zero Hz and go to 5 to 25 MHz depending on the price.? They are not shielded so that may be a problem. One just has

Steve/Chris; See attached schematics. May help if you don't already have these. The transition was at serial #453. I think mine is #456 or something like that - just after the change was made. 73

Hi Steve, thanks for the info.? Do you happen to know what the original maker/PN might be?? I don't have an original to reference.?? This one is SN 861.?? Regards,?Chris kc9ieq On Thu, May 11,

The biggest part of the problem with my setup using the HP-8640B/HP-11710B was my brain. I was going on memory as to what the proper input frequency to the down-converter should be and that was

Steve: I agree with you....but a lot of us OT's are using HP 8640B's as our "go-to" signal gennie and it's great at 455 Khz, but won't do 50 Khz. Wonder what you are using Steve? My solution turned

I have found the simplest way is to just use a signal generator and zero beat. Both of my 2-Bs needed minor adjustment, which is not unexpected after 60+ years. 73, Steve Wedge, W1ES/4 Time flies like

Chris, the output transformer is a generic part that was very common in the days when this receiver was made. The 6AQ5 was very commonly used as an audio output amp and Drake used a fairly standard

Hi all,? I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed.? Tall order but has anybody an

Barry, By golley, you are right, the TS-440s only goes down to 100KHz! I could have sworn it could go lower. Well, you can hear maybe the 2nd but for sure the 3rd harmonic of the BFO. If you haven't